Hi, I am working with a large .csv file with abundance data. It is set up as follows:

Month,Zone,Replicate,SpeciesA,SpeciesB,SpeciesC,...
Sept,1,1,5,10,15
Sept,1,2,0,5,10
Sept,1,3,5,0,5
Sept,2,1,5,5,5
Sept,2,2,10,15,10
Sept,2,3,0,0,5

I need to find the mean number (and std dev) of each individual species across three replicates, for each zone, for each month. In all, there are 20 zones that were sampled monthly over the course of a year. I'm new to Perl. I would appreciate any tips that point me in the right direction to be able to generate descriptive statistics for each Month-Zone-Species combination. Thanks.

In reply to Descriptive Stats from .csv file by korsmo

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